<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>将 object 对象中的 key 和 value 互换</title>
</head>

<body>
    <script>
        var num = {
            age: '11',
            name: '22'
        }

        var arr = num.age
        num.age = num.name
        num.name = arr
        console.log(num)
    </script>
</body>

</html>